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(N0 M06161.) 2 Sheets-Sheet 1.

S. E. MOWER.

ELECTRIC MOTOR MECHANISM.

No. 440,718. Patented Nov. 18,1890.

\YfkQEEEEE. IQX/Egh p 2 Sheets-Sheet 2.

(No Model.)

S. E. MOWER.

ELECTRIC MOTOR MEGHANISM.

No. 440,718. Patented Nov. 18. 1890.

IIEIP.

Wt E 5555.

UNITED STATES PATENT OFFICE.

SAMUEL E. MOI/VER, OF NEW HAVEN, CONNECTICUT, ASSIGNOR TO HENRY G.TI-IOl\/IPSON & SONS, OF SAME PLACE.

ELECTRIC-MOTOR MECHANISM.

SPECIFlCATION forming part of Letters Patent No. 440,718, dated November 18, 1890., I

Application filed May 10 1890i Serial No. 351,242. (No model) To wZZ whom it may concern:

Be it known that l, SAMUEL E. MOWER, of New Haven, county of New Haven, State of Connecticut, have invented an Improvement in Electric-Motor Mechanism, of which the following description, in connection with the accompanying drawings, is a specification, like letters on the drawings representing like parts.

This invention relates to electricmotor mechanism especially adapted to be used on street-railway cars, and is an improvement upon the motor mechanism shown and described in another application, Serial No. 329,760, filed by me November 9,1889.

My present invention relates more particularly to the speed-reducing mechanism, and has for its object to improve the construction of the same.

The particular features in which my invention consists will be pointed out in the claims at the end of this specification.

Figure 1 is a top or plan View of a car-axle having mounted upon it an electric motor mechanism embodying my invention; Fig. 2, a sectional view of the motor mechanism shown in Fig. 1 on linear as, and Fig. 3, a sectional detail, to be referred to, on line y y, Fig. 1,

The yoke or arm A, supported on the caraxle A, provided with wheels A the fieldmagnets a, secured to the said yoke, the armature a, secured to or forming part of the sleeve a mounted upon the axle A, may be substantially such as shown and described in my application referred to, The sleeve a has secured to it, as by a key a (see Fig. 3,) a gear a, provided, as herein shown, with circumferential teeth to form a friction-gear. The friction-gear a has cooperating with it, as herein shown, preferably four like frictiongears of, keyed upon shafts (its, having bearings in a disk a provided with boxes a loosely fitted into recesses in the periphery of the said disk. The friction-gears a are preferably loosely keyed to the shafts o, to allow a slight lateral motion, and thus relieve the gears from side-thrust of the motor, The disk a may be made fast on the axle A bya suitable key, or it may be loose thereon.

Each shaft a has mounted upon it on the side of the disk opposite to that on which the friction-gears a are located a pinion b, provided with circumferential teeth to form frictionpinions, which are adapted to be brought into engagement, as will be described, with a friction-gear 11', secured to the axle A, as by a key 17 The loose boxes a and the disk a are encircled by a friction-strap 17 having its ends secured in suitable manner to a rod b, by turning which the said friction-strap may be made to move the loose boxes a radially toward the axle and clamp the shafts a, the said boxes when the friction-strap is unlooscued being normally held away from the disk a by a cushion, herein shown as spiral springs b encircling screws or rods b extended through the boxes a In operation the gear a is revolved con tinuously, and when the friction strap is unloosened the friotion gears a are not revolved and the car axle remains stationary; but if the driver or operator on the car turns the rod b to tighten or bind the friction-strap Z2 and force the movable boxes a in toward the axle the friction-gears a are brought into engagement with the gear a and the shafts a will be revolved, thus producing revolution of the car axle through the friction-pinions b and gear 12,

The speed at which the car-axle is revolved may be controlled by regulating the pressure of the friction strap b upon the movable boxes.

I have herein shown the friction-gear a as engaged by four friction gears a; but I do not desire to limit myself to any particular number of the gears a as one or more may be used; but I prefer to employ the number herein shown.

I claim- 1. In an electric-motor mechanism, the combination, with an axle and a motor having its armature secured to a sleeve loosely mounted on said axle, of a speed-reducing mechanism consisting of a gear fast on the armaturesleeve, a disk, a, mounted on the axle and provided with a recess in its periphery, a shaft a carried by said dish, a movable box for said shaft, a gear a on the shaft to co operate with the gear on the said shaft, and

a gear fast on the axle, and a friction-strap encircling the movable box and disk, and

means to engage said strap with the said disk, 5 substantially as described.

2. In an electric-motor mechanism, the combination, with an axle and a motor having its armature secured to a sleeve loosely mounted on said axle, of a speed-reducing mechanism IO consisting of afriction-gear fast on the armature-sleeve, a disk a mounted on the axle and provided with recesses in its periphery, shafts a, carried by said disk, movable boxes for said shafts, friction gears a on the said I 5 shafts to engage the friction-gear on the armatare-sleeve, friction-pinions on the shafts a, a friction-gear fast on the axle adapted to be engaged by the friction-pinions, a cushion interposed between the movable boxes and disk, a friction-strap encircling the movable boxes 20 and disk, and means to engage said strap with the said disk, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing Witnesses.

SAMUEL E. MOXVER.

NVitnesses:

HENRY G. THOMPSON, L. 1-1. DAYTON. 

